DC current bus distributed power system and its stability analysis. Issue 3 (25th January 2019)

• Record Type: Journal Article
• Authors: Wei, Yuqi; Luo, Quanming; Chen, Si; Huang, Jian; Zhou, Luowei
• Is Part Of: IET power electronics. Volume 12:Issue 3(2019)
• Page Start: 458
• Page End: 464
• Publication Date: 2019-01-25
• Subjects: DC‐DC power convertors -- power system stability; DC current bus distributed power system -- stability analysis -- high power density -- converter sensitivity -- converters transient performance -- DC voltage bus -- current bus DPS -- DC‐DC converters -- two‐port small signal model; Power electronics -- Periodicals; 621.31705
• DOI: 10.1049/iet-pel.2018.5533
• Languages: English
• ISSNs: 1755-4535

Abstract

Abstract : DC distributed power systems (DPSs) have attained much attention because of its characteristics of high efficiency, high power density and flexible configuration. However, when converters are interconnected in a system, adverse interactions may occur due to the converter sensitivity to the external impedance, these interactions may degrade converters transient performance or cause stability issues. Currently, research mainly focuses on DPS with a DC voltage bus, including stability analysis and approaches to improve system stability. This study is to establish stability criteria for DPS with a DC current bus. Firstly, basic current type DC/DC converters and their small signal models are introduced. Then, the current bus DPS is derived, discussed, and the stability criteria are obtained by using two‐port small signal model. The proposed criteria are verified by comparing the results of theoretical calculations and simulations. Finally, an experimental prototype is built to validate the theoretical analysis and simulation.